stft

[asipers]

Hello, I think the TFA STFT vi does  not give the correct results.Can you give me the correct formula for the calculation of the spectrogram in the TFA STFT Spectrogram (waveform) VI?Right Click->Help: There is no detailed information about the math used in this VI.Please, see attachment. Regards, asipers

[Peter_Schutte_NINL]

Hi Asipers,

It seems like you are creating a double posting on the same subject.

Over here, you've already asked the same question.

If the answer given is not the one you're looking for, please reply to it in the other thread.

Regards,

Peter S

[asipers]

Hi Peter,

The previous question was about the TFA STFT Spectrogram VI.

This question is about the TFA STFT Coefficients VI, see attachment.

The results of the TFA STFT Coefficients VI are not corresponding with the formula in the VI's-help documentation.

Please, can you look at it?

Thanks and regards

A. Sipers

[Peter_Schutte_NINL]

Hi A. Sipers,

I have been studying your request, but I cannot directly tell if you're right or not.

Would it be possible for you post your code (VI) on the forum? Then we can test whether the function is working properly or not in your case.

There are a few implementations of these calculations, which sometimes makes it hard to follow.

Thanks in advance for posting!

Regards,

Peter S

[asipers]

Hi Peter,

Thanks for studying my VI, see attachment.

I hope you can help me. 

Regards,

Aloys Sipers

[Peter_Schutte_NINL]

Hi Aloys,

I've been in contact with some colleagues, but they informed me that the VI is working properly. The formula's used, are also described at the following weblink:

Short-Time Fourier Transform

If you still have doubts in the function VI, please provide us the expected Array values for your VI as well.

Best regards,

Peter S